Giant
Continuum 7 Computer

Details

Giant's Continuum 7 is a simple way to get the most out of your rides. It tracks seven essential functions, including distance and speed, has a large, easy-to-read display, and uses a wired sensor and handlebar mount that attaches easily to your bike.

If you dont push the chrome button on the side of the computer, it wont keep track of anything. I would think that when the wheel starts to spin the comp would wake up and keep track, not the case here. If you forget to push the button you will have an inacurate reading.